When seedlings have grown their second or third set of serrated leaves (not counting the round cotyledons that initially emerge from the seed) they are usually hardy enough to flourish in direct sunlight

Seedlings will benefit from a bright (though not, initially, under lamps or in direct sunlight), warm (21ºC) and humid environment.

With cannabis seeds, the most effective method of germination requires only two saucers and some moist tissue.